1383921665610 has 128 divisors (see below), whose sum is σ = 3639847124736. Its totient is φ = 333972387840.

The previous prime is 1383921665597. The next prime is 1383921665611. The reversal of 1383921665610 is 165661293831.

It is not an unprimeable number, because it can be changed into a prime (1383921665611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 79834504 + ... + 79851836.

It is an arithmetic number, because the mean of its divisors is an integer number (28436305662).

Almost surely, 2^{1383921665610} is an apocalyptic number.

1383921665610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1383921665610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1819923562368).

1383921665610 is an abundant number, since it is smaller than the sum of its proper divisors (2255925459126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1383921665610 is a wasteful number, since it uses less digits than its factorization.

1383921665610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18440.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 1383921665610 in words is "one trillion, three hundred eighty-three billion, nine hundred twenty-one million, six hundred sixty-five thousand, six hundred ten".